Unit 1: Information failure: Drinking "by stealth"

An interesting article from the BBC re alcohol consumption

http://news.bbc.co.uk/1/hi/health/8223294.stm

a) How does this "stealth drinking" represent information failure?
b) What actions could the government take to reduce this information failure and so reach a more allocatively efficient consumption of alcohol?
c) What other examples of information failure are mentioned in the article?